HP9850mfp

[rusticmountain]

i am taking over a call for tech that has hit the wall with images not laying ontop of eachother.he has replaced transfer and trans cl.assy and transport unit.
that didnot change symptom.
any sugestions on where to take over... trans.drive?

[Berny]

Are you talking about Color registration problem ?

Usually caused by dirty registration sensors

To calibrate the sensors, perform the following:
1. Disable Color Registration Correction Control in the 25 mode, software dip switch 25, bits 3 to 1 (ON) and bit 4 to 0 (OFF).
2. Run the [Auto Color Registration Adjustment] in the 36 mode.
3. Try Running the Manual Registration Adjustment.
4. Remember to enable Color Registration Correction Control after the adjustment.
If the problem persists, there could be a dirty or failed color registration sensor (PS8 or PS9). Check their operation in the 47 service mode. Replace the failed sensor, if necessary.


As the HP9850 is a Konica C500 try the Konica Forum to have better answer Have only 1 of those machine in the field